4z-9=z+9

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Solution for 4z-9=z+9 equation: 



4z-9=z+9

We move all terms to the left:

4z-9-(z+9)=0

We get rid of parentheses

4z-z-9-9=0

We add all the numbers together, and all the variables

3z-18=0

We move all terms containing z to the left, all other terms to the right

3z=18

z=18/3

z=6

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